forget the skunks Yasuhikotakia morleti they don't play nice with other botias except those in the same group
IE Y.caudipunctata, Y.eos, Y.modesta etc and even then, they can be the worst of the bunch.
kuhlies should be ok with small clowns and yoyos but could become food with larger ones.
yoyos and clowns will be ok together but remember both are hierarchal and need to be in groups of at least 3
for the hierarchy to work best.
additionaly, depending on the actual species of 'yoyo' (Botia almorhae or Botia lohachata [no they are not the same thing]),
you could be looking at a fish that reaches 8+inches.
clowns can attain 12 inches so you need a big tank to keep both together in the correct group sizes.